JP2015100831A - Roll press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll press machine which inhibits a film thickness from being reduced, with a simple structure, even when rolls thermally expand.SOLUTION: A roll press machine 1 includes: a roll 10 and a roll 20 which are provided so that rotation surfaces face each other in a direction L1; a rotary shaft 11 which extends in a direction L2 perpendicular to the direction L1 and rotates the roll 10; a bearing part 12 which supports the rotary shaft 11; a rotary shaft 21 which extends in the direction L2 and rotates the roll 20; a bearing part 22 which supports the rotary shaft 21; a support member 30 which is provided between the bearing part 12 and the bearing part 22 and supports the bearing part 12 and the bearing part 22; and a heater 40 for heating the support member 30. The support member 30 is formed by a thermal expansion member which is expanded by heat.

Description

  The present invention relates to a roll press machine.

  When manufacturing the electrode used for a battery, an electrode paste is apply | coated to strip | belt-shaped metal foil, and an active material layer is formed. And in order to make the density of the formed active material layer high, an active material layer is pressed with a roll press machine (for example, refer to patent documents 1).

JP 2011-181348 A

  When the roll press machine is continuously operated, friction heat generated between the rotary shaft of the roll and the bearing portion is transmitted to the roll, and the roll may thermally expand. In this case, as the operation time becomes longer, the film thickness of the electrode processed by the roll press machine may become thinner than the desired film thickness.

  Patent Document 1 describes a roll press machine that enables continuous compression processing of an electrode material for a secondary battery with high processing accuracy even when operated for a long time. The roll press machine described in Patent Document 1 has a cooling structure that takes heat of the roll bearing by circulating a heat medium through a bearing box that houses and holds the bearing of the pressure roll. With such a configuration, thermal deformation of the roll caused by mechanical frictional heat of the bearing portion of the roll press machine is prevented. However, when a cooling structure is provided around the bearing portion of the pressure roll, it is necessary to provide a cooling structure for each bearing portion, and thus there is a possibility that the configuration of the pressure roll of the roll press machine becomes large.

  Therefore, in this technical field, there is a demand for a roll press machine that has a simple configuration and is less likely to have a reduced film thickness even when the roll is thermally expanded.

  A roll press machine according to an aspect of the present invention includes a first roll and a second roll that are provided so that their rotational surfaces face each other in a first direction, and a first roll that extends in a second direction that intersects the first direction. A first rotating shaft that rotates the first rotating shaft, a first bearing portion that supports the first rotating shaft, a second rotating shaft that extends in the second direction and rotates the second roll, and a second bearing that supports the second rotating shaft And a support member provided between the first bearing portion and the second bearing portion and supporting the first bearing portion and the second bearing portion, and a heater for heating the support member. The member is a thermal expansion member that expands by heat.

  In this roll press, the heater can be expanded by heating the support member. By expanding the support member, the distance between the first bearing portion and the second bearing portion can be increased. For this reason, the distance of a 1st rotating shaft and a 2nd rotating shaft can be extended. Therefore, for example, even when the first roll or the second roll is thermally expanded, it is possible to suppress a decrease in the distance between the rotating surface of the first roll and the rotating surface of the second roll. As a result, it can suppress that the film thickness of the electrode processed by the 1st roll and the 2nd roll becomes thinner than a desired film thickness.

  In the roll press machine according to one aspect of the present invention, the support member is provided in the first bearing portion and the second bearing portion that are movable along the third direction intersecting the first direction and the second bearing portion. The first member may have a first surface that is inclined with respect to the third direction, the second member is opposed to the first surface, and is in the third direction. The first member and the second member may be provided such that the first surface and the second surface are in contact with each other. In this case, the position where the first surface and the second surface abut each other can be adjusted by moving the first member in the third direction with respect to the first bearing portion. For this reason, the distance between the first bearing portion and the second bearing portion can be adjusted to a desired distance, and the distance between the rotating surface of the first roll and the rotating surface of the second roll can be adjusted.

  According to one embodiment and one aspect of the present invention, it is possible to provide a roll press machine with a simple configuration in which the film thickness does not easily decrease even when the roll is thermally expanded.

It is a front view showing typically the roll press machine concerning this embodiment. It is a side view which shows typically the roll press machine which concerns on this embodiment. It is a figure for demonstrating the block with which the roll press which concerns on this embodiment is provided.

  Embodiments of a roll press according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a front view schematically showing the roll press machine according to the present embodiment. FIG. 2 is a side view schematically showing the roll press machine according to the present embodiment. The roll press machine 1 which concerns on this embodiment is employable as a roll press machine used at the press process which is one process for manufacturing the electrode of a battery, for example. In this case, the manufactured electrode may be an electrode used for a lithium ion secondary battery.

  As shown in FIGS. 1 and 2, the roll press machine 1 includes a roll 10 (first roll), a roll 20 (second roll), a rotary shaft 11 (first rotary shaft), and a rotary shaft 21 ( A second rotating shaft), bearing portions 12 and 13 (first bearing portion), bearing portions 22 and 23 (second bearing portion), a support member 30, and a heater 40. In the following description, for convenience of explanation, the roll press 1 will be described using an orthogonal coordinate system composed of directions L1, L2, and L3.

  The roll 10 and the roll 20 are members for pressing a metal foil, for example, to manufacture a battery electrode. The roll 10 and the roll 20 have a substantially cylindrical shape. The roll 10 and the roll 20 are provided such that the rotation surfaces face each other in the direction L1 (first direction). As the roll material of the roll 10 and the roll material of the roll 20, for example, a steel material can be used, and a high carbon chrome bearing steel material may be used. As the high carbon chromium bearing steel material, for example, a steel material defined as SUJ2 of the standard number JISG4805 in the JIS standard can be used. The rotating surface of the roll 10 and the rotating surface of the roll 20 may be plated with hard chrome.

  The rotating shaft 11 is a rotating shaft of the roll 10 and is a member for rotating the roll 10. The rotating shaft 11 extends in the direction L2 (second direction). One end of the rotating shaft 11 in the direction L2 may be connected to a driving machine that drives the rotating shaft 11.

  The bearing portions 12 and 13 are members for supporting the rotating shaft 11. The bearing portion 12 is provided on the rotating shaft 11 on one end side in the direction L2 of the roll 10. The bearing portion 13 is provided on the rotating shaft 11 on the other end side in the direction L2 of the roll 10.

  The rotating shaft 21 is a rotating shaft of the roll 20 and is a member for rotating the roll 20. The rotating shaft 21 extends in the direction L2. One end of the rotation shaft 21 in the direction L2 may be connected to a driving machine that drives the rotation shaft 21.

  The bearing portions 22 and 23 are members for supporting the rotating shaft 21. The bearing portion 22 is provided on the rotating shaft 21 on one end side in the direction L2 of the roll 20. The bearing portion 23 is provided on the rotating shaft 21 on the other end side in the direction L2 of the roll 20.

  The support member 30 is a member for supporting the bearing portions 12 and 13 and the bearing portions 22 and 23. The support member 30 includes a first support member 30a and a second support member 30b.

  The first support member 30 a is a member for supporting the bearing portion 12 and the bearing portion 22. The first support member 30a has a block 31 (first member) and a block 32 (second member). The block 31 is provided in the bearing portion 12 so as to be movable along a direction L3 (third direction) intersecting the direction L1. The block 31 is provided on the side facing the bearing portion 22 in the bearing portion 12, for example. The block 31 has a first surface 31a. The first surface 31a is inclined with respect to the direction L3. For example, the first surface 31a is inclined from the bearing portion 12 side to the bearing portion 22 side as it proceeds from one end to the other end in the direction L3. The block 31 may be a tapered block having a substantially trapezoidal cross-sectional shape perpendicular to the direction L2. The block 31 is made of a thermal expansion member.

  The block 32 is provided in the bearing portion 22. The block 32 is provided, for example, on the side of the bearing portion 22 that faces the bearing portion 12. The block 32 has a second surface 32a facing the first surface 31a. The second surface 32a is inclined with respect to the direction L3. For example, the second surface 32a is inclined from the bearing portion 12 side to the bearing portion 22 side as it proceeds from one end to the other end in the direction L3. The block 32 may be a tapered block having a substantially trapezoidal cross-sectional shape perpendicular to the direction L2. The block 32 is made of a thermal expansion member.

  During the operation of the roll press 1, the first surface 31a of the block 31 and the second surface 32a of the block 32 are in contact with each other.

  The second support member 30 b is a member for supporting the bearing portion 13 and the bearing portion 23. The second support member 30 b has a block 33 and a block 34. The block 33 is provided in the bearing portion 13 so as to be movable along the direction L3. The block 33 is provided, for example, on the side of the bearing portion 13 that faces the bearing portion 23. The block 33 has a third surface 33a. The third surface 33a is inclined with respect to the direction L3. For example, the third surface 33a is inclined from the bearing portion 13 side to the bearing portion 23 side as it proceeds from one end to the other end in the direction L3. The block 33 may be a tapered block having a substantially trapezoidal cross-sectional shape perpendicular to the direction L2. The block 33 is made of a thermal expansion member.

  The block 34 is provided in the bearing portion 23. The block 34 is provided, for example, on the side of the bearing portion 23 that faces the bearing portion 13. The block 34 has a fourth surface 34a facing the third surface 33a. The fourth surface 34a is inclined with respect to the direction L3. For example, the fourth surface 34a is inclined from the bearing portion 13 side to the bearing portion 23 side as it proceeds from one end to the other end in the direction L3. The block 34 may be a tapered block having a substantially trapezoidal cross-sectional shape perpendicular to the direction L2. The block 34 is made of a thermal expansion member.

  During the operation of the roll press 1, the third surface 33a of the block 33 and the fourth surface 34a of the block 34 are in contact with each other.

  The thermal expansion member which comprises the blocks 31-34 is a member which can obtain a desired thermal expansion coefficient, Comprising: For example, it is a member comprised including a thermal expansion material. The thermal expansion member is, for example, plastic mold steel such as pre-hardened steel. As the plastic mold steel, for example, a pre-hardened steel whose pre-hardened steel is specified by HPM7 in a pre-hardened steel manufactured by Hitachi Metal Tool Steel Co., Ltd. can be used.

  The heater 40 is a device for heating the support member 30. Hereinafter, an example of an aspect in which the block 31 is heated by the heater 40 will be described. Here, the block 31 will be described as an example of the support member 30, but the blocks 32 to 34 may be heated in the same manner.

  Here, the heater 40 will be described with reference to FIG. FIG. 3 is a diagram for explaining blocks provided in the roll press according to the present embodiment. As shown in FIG. 3, the heater 40 has a fluid path 41. The fluid path 41 is provided inside the block 31. The heater 40 heats a heat medium flowing in the fluid path 41, for example. Here, the heat medium means a fluid containing liquid or gas, and may be a known material used for the purpose of heat exchange. The heater 40 heats or cools the block 31 by passing a heat medium having a temperature different from that of the block 31 through the fluid path 41.

  The heater 40 may further include a temperature control unit that controls the temperature of the support member 30. The temperature control unit functions as temperature control means for controlling the temperature of the support member 30. The temperature control unit may include a temperature detection unit that detects the temperature of the roll 10 or the roll 20. In this case, the temperature control unit adjusts the amount of heat by which the heater 40 heats the support member 30 based on the temperature of the roll 10 or the roll 20 detected by the temperature detection unit, for example. Alternatively, the temperature control unit may include a distance detection unit that detects a distance (clearance) between the rotation surface of the roll 10 and the rotation surface of the roll 20. In this case, for example, the temperature control unit adjusts the amount of heat by which the heater 40 heats the support member 30 based on the distance between the rotation surface of the roll 10 and the rotation surface of the roll 20 detected by the distance detection unit.

  Next, the aspect which adjusts the distance of the rotating surface of the roll 10 in the roll press machine 1 and the rotating surface of the roll 20 is demonstrated. As an aspect for adjusting the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20, initial adjustment and adjustment during operation will be exemplified.

  The initial adjustment is a mode in which the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20 is adjusted in a state before the roll 10 and the roll 20 are rotated. In the initial adjustment, first, the block 31 is moved along the direction L3 so that the distance between the rotation surface of the roll 10 and the rotation surface of the roll 20 is a desired distance. Since the first surface 31a of the block 31 and the second surface 32a of the block 32 are inclined with respect to the third direction, the position where the first surface 31a and the second surface 32a abut on each other is adjusted. Then, the rotating shaft 11 and the rotating shaft 21 are brought closer to each other along the direction L1. By reducing the distance between the rotating shaft 11 and the rotating shaft 21, the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20 is adjusted.

  The adjustment during operation is a mode in which the distance between the rotation surface of the roll 10 and the rotation surface of the roll 20 is adjusted during the operation of the roll press 1. When the roll press machine 1 is continuously operated, frictional heat generated between the rotary shaft 11 and the bearing portions 12 and 13 is transmitted to the roll 10 and the roll 10 may be thermally expanded. In addition, frictional heat generated between the rotary shaft 21 and the bearing portions 22 and 23 may be transmitted to the roll 20 and the roll 20 may be thermally expanded. For this reason, the heater 40 heats the blocks 31 to 34 according to the expansion of the roll 10 and the roll 20. For example, the heater 40 heats the blocks 31 to 34 according to the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20. Thereby, since the heated blocks 31 to 34 are thermally expanded, the distance between the bearing portion 12 and the bearing portion 22 and the distance between the bearing portion 13 and the bearing portion 23 are increased. For this reason, the distance between the rotating shaft 11 and the rotating shaft 21 is widened, and the decrease in the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20 is reduced.

  According to the roll press machine 1 configured as described above, the support member 30 can be expanded by the heater 40 heating the support member 30. By expanding the support member 30, the distance between the bearing portion 12 and the bearing portion 22 can be increased. For this reason, the distance between the rotating shaft 11 and the rotating shaft 21 can be increased. Therefore, for example, even when the roll 10 or the roll 20 is thermally expanded, it is possible to suppress a decrease in the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20. As a result, it can suppress that the film thickness of the electrode processed by the roll 10 and the roll 20 becomes thinner than a desired film thickness.

  Furthermore, the position where the first surface 31a and the second surface 32a abut each other can be adjusted by moving the block 31 in the direction L3 with respect to the bearing portion 12. For this reason, the distance between the bearing portion 12 and the bearing portion 22 can be adjusted to a desired distance. Similarly, the position where the third surface 33a and the fourth surface 34a abut each other can be adjusted by moving the block 33 in the direction L3 with respect to the bearing portion 13. For this reason, the distance between the bearing portion 13 and the bearing portion 23 can be adjusted to a desired distance, and the distance between the rotating surface of the roll 10 and the rotating surface of the roll 20 can be adjusted.

  As mentioned above, although embodiment which concerns on this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can implement in a various aspect.

  In the above embodiment, the mode in which the block is heated by flowing a heat medium in the fluid path 41 has been described. However, the mode in which the heater 40 heats the blocks 31 to 34 is not limited thereto. For example, the blocks 31 to 34 may have a heating wire for heating the blocks 31 to 34. For example, the heating wire may be formed of a member having high electrical resistance such as a nichrome wire. The heater 40 may heat the heating wire by applying a voltage to the heating wire.

  In the above embodiment, the case where the pair of bearing portions 12 and 13 support the rotating shaft 11 and the pair of bearing portions 22 and 23 support the rotating shaft 21 is described, but the present invention is not limited to this. For example, the rotation shaft may be supported by one or more bearing portions. In this case, for example, the support member 30 is provided between the one bearing portion that supports the rotating shaft 11 and the one bearing portion that supports the rotating shaft 21, and the supporting member 30 supports the rotating shaft 11. You may support a bearing part and one bearing part which supports the rotating shaft 21. FIG.

  In the above embodiment, the case where the first support member 30a includes the block 31 and the block 32 and the second support member 30b includes the block 33 and the block 34 has been described. However, the present invention is not limited thereto. Not. For example, the first support member 30a may be an integrally configured member. Moreover, the 2nd support member 30b may be a member comprised integrally, for example.

  In said embodiment, although applied to the roll press machine provided with a pair of roll, it is not limited to this, You may apply to a roll press machine provided with one roll. At this time, you may use the support member of this embodiment as a support member which supports 1 roll.

  In the above embodiment, an electrode used for a lithium ion secondary battery is manufactured. However, the present invention is not limited to this. For example, the manufactured electrode is used in a power storage device such as a secondary battery or an electric double layer capacitor. The electrode used may be used. As the secondary battery, for example, a non-aqueous electrolyte secondary battery may be used. Moreover, the manufactured electrode may be used for a primary battery.

  DESCRIPTION OF SYMBOLS 1 ... Roll press machine, 10 ... Roll (1st roll), 20 ... Roll (2nd roll), 11 ... Rotating shaft (1st rotating shaft), 21 ... Rotating shaft (2nd rotating shaft), 12 ... Bearing part (First bearing part), 13 ... bearing part (second bearing part), 22, 23 ... bearing part, 30 ... support member, 31 ... block (first member), 32 ... block (second member), 33, 34 ... Block, 31a ... First surface, 32a ... Second surface, 33a ... Third surface, 34a ... Fourth surface, 40 ... Heater, 41 ... Fluid path.

Claims (2)

A first roll and a second roll provided so that the rotation surfaces face each other in the first direction;
A first rotation axis extending in a second direction intersecting the first direction and rotating the first roll;
A first bearing portion for supporting the first rotating shaft;
A second rotating shaft extending in the second direction and rotating the second roll;
A second bearing portion for supporting the second rotating shaft;
A support member provided between the first bearing portion and the second bearing portion, and supporting the first bearing portion and the second bearing portion;
A heater for heating the support member,
The said support member is a roll press machine which consists of a thermal expansion member expanded by heat. The support member includes a first member provided in the first bearing portion movably along a third direction intersecting the first direction, and a second member provided in the second bearing portion,
The first member has a first surface inclined with respect to the third direction,
The second member has a second surface facing the first surface and inclined with respect to the third direction;
The roll press machine according to claim 1, wherein the first member and the second member are provided such that the first surface and the second surface are in contact with each other.

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